111112211101 has 4 divisors (see below), whose sum is σ = 111359677500. Its totient is φ = 110864744704.

The previous prime is 111112211099. The next prime is 111112211107. The reversal of 111112211101 is 101112211111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101112211111 = 20477 ⋅4937843.

It can be written as a sum of positive squares in 2 ways, for example, as 85878888601 + 25233322500 = 293051^2 + 158850^2 .

It is a cyclic number.

It is not a de Polignac number, because 111112211101 - 2¹ = 111112211099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112211107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123732526 + ... + 123733423.

It is an arithmetic number, because the mean of its divisors is an integer number (27839919375).

Almost surely, 2^111112211101 is an apocalyptic number.

It is an amenable number.

111112211101 is a deficient number, since it is larger than the sum of its proper divisors (247466399).

111112211101 is an equidigital number, since it uses as much as digits as its factorization.

111112211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247466398.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 111112211101 its reverse (101112211111), we get a palindrome (212224422212).

The spelling of 111112211101 in words is "one hundred eleven billion, one hundred twelve million, two hundred eleven thousand, one hundred one".